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Evgeniy Stepanov
e010508942
Basic codegen for MTE stack tagging.
Implement IR intrinsics for stack tagging. Generated code is very unoptimized for now. Two special intrinsics, llvm.aarch64.irg.sp and llvm.aarch64.tagp are used to implement a tagged stack frame pointer in a virtual register. Differential Revision: https://reviews.llvm.org/D64172 llvm-svn: 366360
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